Front Suspension Knuckle - Left for Tesla Model X (2015-2021) | 1027311-00-F

Why This Left Front Knuckle Defines Your Model X’s Ride

• X-Specific Engineering: Tailored to the left front suspension, with reinforced mounting points to accommodate the Model X’s wider front track (67.7 inches) and heavier load distribution (from battery and third-row seating). Its design prevents wheel rub during full suspension compression, even with larger tires.
• Heavy-Duty Performance: Withstands up to 2,500 lbs of dynamic load—30% more than Model S knuckles—critical for towing 5,000 lbs or navigating rough terrain without compromising control.

Core Functions: More Than a Metal Bracket

• Steering Precision: Houses the left steering tie rod end, translating driver input into immediate, play-free wheel movement. A worn knuckle causes “slop” in the steering wheel, making tight turns or parking less predictable.
• Force Distribution: Channels lateral forces (from cornering) and vertical impacts (from potholes) to upper/lower control arms, reducing stress on $500+ bushings and ball joints—especially important for off-road use.
• Brake & Hub Integration: Provides a rigid base for the left front brake caliper (matching the X’s 15.4-inch rotors) and wheel hub, ensuring consistent braking and vibration-free rotation at speeds up to 155 mph.

Signs It’s Time to Replace

• Pulling to the Right: Vehicle drifts right on straight roads, indicating knuckle deformation that throws off camber/toe.
• Steering Vibration: Shaking at 50+ mph (worse during braking) from a warped knuckle disrupting wheel balance.
• Uneven Tire Wear: Excessive left front tire shoulder wear (vs. right) signals misalignment from a bent/cracked knuckle.
• Clunking in Turns: Metallic “knocks” when steering left, a sign of loose mounting points or internal damage.

Built to Tesla’s Standards

• Material: Forged from SAE 4140 chromoly steel (tensile strength 1,100 MPa) with heat treatment to resist fatigue under heavy loads—outperforming cast alternatives.
• Precision Machining: CNC-machined to ±0.01mm tolerance, ensuring perfect alignment with control arms, hub, and brake caliper. No modification needed for a direct fit.
• Corrosion Protection: 7-layer coating (zinc plating + epoxy) withstands 1,500 hours of salt spray testing—ideal for snowy or coastal regions where road salt accelerates rust.

Professional Installation: Safety First

1. Prep: Disconnect 12V battery, remove left front wheel, brake caliper, and rotor. Secure the front end with jack stands.
2. Removal: Detach tie rod end, upper/lower control arms, and sway bar link. Press out old hub bearing (replace with 1043285-00-A for best results).
3. Installation: Press new hub into the knuckle, torque retaining nut to 220 Nm. Reattach components with precise torque: control arms (130 Nm), tie rod (85 Nm), sway bar link (50 Nm).
4. Alignment: Mandatory 4-wheel alignment to reset camber (-1.2° ±0.3°), caster (7.0° ±0.5°), and toe (0° ±0.1°) for safe handling.